eaton gen 2 display problem.pablo help!

Discussion in 'Volvo Forum' started by QUALITYTRUCK, Apr 5, 2012.

  1. Apr 5, 2012 #1
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    have 2006 vn with D12 engine.eaton gen 2 auto transmission.gear selection displays (--).trans.shifts correctly.goes in and out of gear.just the display does not show what gear you are in.display is in message center in middle of dash display.thanks.
     
    QUALITYTRUCK, Apr 5, 2012
    QUALITYTRUCK, Apr 5, 2012
    #1
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  3. Apr 5, 2012 #2
    Pablo-UA

    Pablo-UA Road Train Member

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    bad J1708 wiring from cab TCU. It is in floor. sometimes broken wires from seat to floor.

    Tranny shifts well, becouse ECU and TCU communicate via J1939. J1708 is used for display and diagnostics, so you cant access to TCU tor read codes from dashboard computer and it does not read the actual gear. Mid 144 saves TCU J1708 communication fault code.

    Wires may be black (400-401) ore gray/orange twisted pair like on FH. I saw both
     
    Pablo-UA, Apr 5, 2012
    Pablo-UA, Apr 5, 2012
    #2
    QUALITYTRUCK and Mlaz Bogdanci Thank this.
  4. Apr 5, 2012 #3
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    where in the floor is the TCU?do the wires run between the TCU and the eaton ECU mounted on the transmission?thanks for your help pablo!:biggrin_25514:
     
    QUALITYTRUCK, Apr 5, 2012
    QUALITYTRUCK, Apr 5, 2012
    #3
  5. Apr 6, 2012 #4
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    found problem behind seat in connector.#400.wire broken inside insulation from constant air seat up and down.terrible "zip tie" job from factory on harness.thanks again for tip pablo.if i would have slowed down a little bit,i would have found it.i looked at the connector 5 times.
     
    QUALITYTRUCK, Apr 6, 2012
    QUALITYTRUCK, Apr 6, 2012
    #4
  7. Apr 8, 2012 #5
    Pablo-UA

    Pablo-UA Road Train Member

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    This is place #1

    "Upper" TCU is really thing on seat you use to select gear)))))

    Ok, floor wiring and seat to fllor connection is not the problem of Volvo with Eaton tranny, the same problem with I-shift, ZF...

    Mercedes Actros MP2 got the same issue with shifter to FR communication, but connector is hidden behind the seat.
     
    Pablo-UA, Apr 8, 2012
    Pablo-UA, Apr 8, 2012
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    Mlaz Bogdanci and QUALITYTRUCK Thank this.
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